Feb 21 – 25, 2022
Vienna University of Technology
Europe/Vienna timezone

Development and characterization of a DMAPS chip in TowerJazz 180 nm technology for high radiation environments and its use case for the Belle II vertex detector upgrade

Feb 24, 2022, 12:15 PM
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Live Presentation Semiconductor Detectors Semiconductor Detectors


Christian Bespin (University of Bonn (DE))


The increasing availability of commercial CMOS processes with high-resistivity wafers has fueled the R&D of depleted monolithic active pixel sensors (DMAPS) for usage in high energy physics experiments. One of these developments is a series of monolithic pixel detectors with column-drain readout architecture and small collection electrode allowing for low-power designs (TJ-Monopix).
It is designed in a 180 nm TowerJazz CMOS process and features a pixel size of 33 µm x 33 µm. The efforts and improvements on the front-end electronics and sensor design of the current iteration TJ-Monopix2 increase the radiation hardness and efficiency while lowering the threshold and noise.
Results from laboratory measurements and test beam campaigns will be highlighted and discussed to evaluate its usage in high-radiation environments.

With its specifications and expected performance, TJ-Monopix2 will serve as a prototype chip for a future DMAPS chip (OBELIX) that will be investigated within the framework of the VTX collaboration for the upgrade of the Belle II detector at SuperKEKB.

Primary author

Christian Bespin (University of Bonn (DE))


Ivan Berdalovic Ivan Dario Caicedo Sierra (University of Bonn (DE)) Jochen Christian Dingfelder (University of Bonn (DE)) Tomasz Hemperek (University of Bonn (DE)) Toko Hirono (University of Bonn) Fabian Huegging (University of Bonn) Hans Krüger (University of Bonn) Thanushan Kugathasan (CERN) Cesar Augusto Marin Tobon (University of the Witwatersrand (ZA)) Konstantinos Moustakas (PSI - Paul Scherrer Institut) Heinz Pernegger (CERN) Walter Snoeys (CERN) Tianyang Wang (University of Bonn (DE)) Norbert Wermes (University of Bonn (DE))

Presentation materials